Simultaneous Nadir Overpasses (SNOs) between FY3D and NOAA-19
TLE Epoch: 2021 6 13.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(NOAA-19) NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 06/19/2021   15:00:10   (  78.32, -68.67) 06/19/2021   14:58:59  (  78.33, -70.30)   36.74                71
 06/19/2021   15:50:57   ( -78.44,  97.96) 06/19/2021   15:49:53  ( -78.48,  97.93)    4.01                64
 06/19/2021   16:41:43   (  78.48, -94.95) 06/19/2021   16:40:56  (  78.45, -95.02)    3.70                47
 06/19/2021   17:32:27   ( -78.48,  72.35) 06/19/2021   17:31:54  ( -78.45,  72.28)    3.45                33
 06/19/2021   18:23:12   (  78.48,-120.34) 06/19/2021   18:22:55  (  78.50,-120.20)    3.32                17
 06/19/2021   19:13:56   ( -78.48,  46.96) 06/19/2021   19:13:54  ( -78.47,  46.86)    3.08                 2
 06/19/2021   20:04:41   (  78.48,-145.72) 06/19/2021   20:04:55  (  78.51,-145.63)    3.32                14
 06/19/2021   20:55:25   ( -78.49,  21.58) 06/19/2021   20:55:54  ( -78.48,  21.44)    3.30                29
 06/19/2021   21:46:10   (  78.49,-171.10) 06/19/2021   21:46:55  (  78.52,-171.05)    3.83                45
 06/19/2021   22:36:54   ( -78.49,  -3.80) 06/19/2021   22:37:54  ( -78.49,  -3.98)    4.01                60
 06/19/2021   23:27:42   (  78.60, 162.82) 06/19/2021   23:28:54  (  78.57, 163.77)   21.24                72